Roy G. Cullen Building - Credit: Wikimedia Commons
The Roy G. Cullen Building (dedicated as Roy Gustav Cullen Memorial Building) is the oldest building on the present-day campus of the University of Houston. It is believed to be the first building on a campus of higher education in the United States with air conditioning. Construction for the building began in 1938, and was completed the following year. Read more on Wikipedia
Source: en.wikipedia.org